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Adenosine 2a antagonist and striatal dopamine D2 receptors in methamphetamine use disorder

Effect of adenosine 2a antagonist on striatal dopamine D2 receptors in subjects with methamphetamine use disorder: A PET study aiming novel pharmacotherapy development - A2D2-S

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCTs031200330
Enrollment
30
Registered
2021-01-28
Start date
2021-10-28
Completion date
Unknown
Last updated
2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Methamphetamine use disorder Methamphetamine

Interventions

Sponsors

Okita Kyoji
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1)Subject with methamphetamine dependence meeting with DSM-IV-TR criteria aged between 20 and 65 2)Subjects who have used any stimulant within one year 3)Having no difficulties in understanding/talking in Japanese

Exclusion criteria

Exclusion criteria: 1)Past history of neurological and/or psychiatric disorders or current possibility of these disorders 2)Meeting a criteria of dependence on any substance other than methamphetamine or nicotine 3)Regular use of psychotropic drugs which could have an impact on dopamine D2 receptor availability 4)Use of drugs having effects of CYP3A inhibition or induction 5)Intracranial lesion(s) seen in MRI 6)Positive urine-sample test for illegal drug 7)Past history of suicidal ideation or attempt 8)Claustrophobia or aichmophobia 9)Use of psychotropic drugs which could have an impact on dopamine D2 receptor availability 10)Participate in any other clinical trials or studies 11)In case of principle investigator judges inappro priate to participate in the study

Design outcomes

Primary

MeasureTime frame
Striatal dopamine D2 receptor availability

Secondary

MeasureTime frame
SUV of 11C-DAA1106 PET scan in whole-brain area, eyelid movement (eyeblinks), plasma concentration of istradefylline, and neurocognitive measures

Contacts

Public ContactHiromi Muramatsu

National Center of Neurology and Psychiatry

s06hmura@ncnp.go.jp+81-42-341-2711

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Sep 19, 2026